27678648973 has 8 divisors (see below), whose sum is σ = 28403974368. Its totient is φ = 26957034384.

The previous prime is 27678648967. The next prime is 27678648989. The reversal of 27678648973 is 37984687672.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27678648973 is a prime.

It is a super-2 number, since 2×27678648973² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27678648899 and 27678648908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27678648913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 912586 + ... + 942427.

It is an arithmetic number, because the mean of its divisors is an integer number (3550496796).

Almost surely, 2^27678648973 is an apocalyptic number.

It is an amenable number.

27678648973 is a deficient number, since it is larger than the sum of its proper divisors (725325395).

27678648973 is a wasteful number, since it uses less digits than its factorization.

27678648973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855403.

The product of its digits is 170698752, while the sum is 67.

The spelling of 27678648973 in words is "twenty-seven billion, six hundred seventy-eight million, six hundred forty-eight thousand, nine hundred seventy-three".